Bung-bushing.



No'. 739,557. IPATENTED SEPT. 22, i90-.

T. PEDERGAST.

BUNG BUSHI APPLICATION FILED NO 1902.

N0 MODEL.

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,UNiTnD @marries Patented September 22, 1903.

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THOMAS lllNDERtll/XST, OF LANCASTER, PENNSYLVANA, ASSIGNOR Ol" FIFTYNEONE-HUNDREDTHS TO JOHN llEl-t'lZlQltl, Oli 'I/\N()AI\"ll",l{

PPINNSYLVANIA.

BUNG-BU-Si-ilNG.

SPECIFICATION forming part of Letters Patent No. 739,557, datedSeptember 22, 1903.

Application filled November 13,1902. Serial No, 131235. (No model.)

described, and particularly pointed out in the annexed claimsl Theprincipal object of the invention is to provide an improved bushing,rwhich can readily be inserted or scrrnred into tho bung-hole, while itsupper or o uter lange and lower or inner end can be made to bito orembed in the stave and clcnch tho nun-gin of the bungu hole betweenthem, illus bracing the stave, holding the bushing securely in'place,and forming an ell'ective duid-tight seal. A further object is toprovide an interior construction of the bushing which will alord a gripfor the bung or plug,- and allow the latter to swell or expand in suchmanner as to retain itselil securely in place, also, to oder a grip i'orthe espansirm-wrcnch or other implement for serewiunj the bushing intothe bnngf-hole.

These objects are attained by means substantially as illustrated in theaccompanying drawings, which t'orm a part oi' the spcciiication, and inwhichm Figure l is a side elevation of abung-bushingembodyingmyimprovements screwedinte the bung-hole of a cashor barrel, the stave being shown in longitudinal section. Fig. 2 is acentral vertical section thoreoig'and Fig.

; is a central vertical sentieri of .the bushingor` with its lower endexpanded and with the bung in place. Y

lhe letter A designates the bung-stave of a cask or barrel, L denotes ametallic bushing crewed into the bung-hole thereof, and C indicates thebung or plug, of wood or other suitable material. The bung-bushing, asshown, tapers slightly toward its lower or inner end and is exteriorlythreaded foi-screwing intothe stave; but these featuresthough preferred7are inessential, and the bush may be straight and smooth.

The bushing has an upper or outer flange h, which on its lowerside ispreferably formed with two circular grooves b', leaving between them asharp annular edge orridge. When the bushing is screwed into the slaveand forced down to the full extent, this ridge becomes embedded in theouter faceof the stave, compressing the wood within the grooves, thusforming an effective seal around the top or outer cud of the bung-hole.A greater number of the grooves may be formed, with acorrespondinglygreater number of intermediate sharp-pointed projections,-though one ofsuch projectionsissnllicient. ThecircumferenceorI rim h3 of the flangemay turn down and also be sharppointed, so Yas to bite the stave andincrease the tightness of the joint. The bushim,r has its loweroriunerend b1 reduced in respect to the thickness of the walls andadaptedto be expanded against the interior wall of the bungdiole or thelowerend thereof, so as to clcnch and compressthe wood,brace the stave,hold the bush securely in place, and form an eilcctive seal around thelower or inner end- .which when said end is expanded embed themselves inthe stave, and thus hold the bush even more securely. Said lower end isalso preferably interiorly roughencd Aor formed with similar ribs o6,which ail'ord a grip for the expansionwrench or other implement, bymeans whereof the bush is screwed llllllll lll into place, and whichalso afford a grip for the lower or inner end of the nung or plu.

It will loe observed that when the bushing is screwed home in thebung-hole and its lower end expanded, as explained, the margin of v thebung-hole is clenched between the upper flange and lower expanded end,thus bracing the stave at both the outer and inner sides, while the berof the ustave is Compressed and gripped by the bush at both ends, thusholdving the bush very securely and forming a perfectly fluid-tightseal.

An interior annular enlargement or groove bl is formed at or near theupper or outer end of the bushing, leaving, preferably, a sharpprojection or abrupt shoulder B above' the same. When the bush is inplace andthe bung C is driven in, the upper or outer end of the latterswells or expands into said enla 'gement, its edge litting under theshoulder b5, so that the bung is absolutely prevented from blowing out.The lower end of the bung also expands within the expanded lower' end ofthe bush, swelling itself against the roughened interior thereof, thusforming an exceedingly effective seal between the bung and its bushing.

Having thus fully described my invention, what l claim as new, anddesire to secure by Letters Patent of the United States, is-

1. A bung-bushing comprising a ring or sleeve, adapted to fit within abung-hole, havl ing an upper flange to engage the outer face ofthestave, and having its lower end cut away cirou in fereutially, providinganabrupt thin or reduced part which can be expanded against the interioror lower end of the bunghole, substantially as described.

2. A bung-bushing comprising a threaded ring or sleevehaving an upperflange and its screw-threads eut away from its lower end which is alsoreduced exteriorly and interioriy beveled, substantially as described.

3. A bung-bushing, adapted to t Within abung-hole, having an upper angeformed withl a sharp annular ridge adapted to embed in the outer face ofthe stave, and having its lower end substantially reduoed in thicknessand adapted to be expanded outwardly against the interioror lower end ofthe bunghole.

4. A bung-bushing comprising a ring or sleeve having an upper or outerflange and a lower end adapted to be expanded outward, said lower endbeing formed externally with vertically-disposed sharp ribs orcorrugations.

5. A bung-bushing comprising a ring or sleeve, having an upper or outerflange formed on its under side with oireulargrooves, leaving anintermediate sharp annular ridge, and having a lower externally-reducedend adapted to be expanded outward and formed internally and externallywith sharp ribs or oorrugations, and having an'interior annular grooveor enlargement nearits upper or outer end', substantially as and for thepurposes'described.

6. A bung-bushing, having a lower end

